Fixed compatible mode in most runtime files.

runtime/syntax/ada.vim

@@ -32,6 +32,8 @@
 if exists("b:current_syntax") || version < 700
     finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 let b:current_syntax = "ada"
 
@@ -352,6 +354,9 @@ endif
 " this speeds things up greatly.
 syntax sync minlines=1 maxlines=1
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 finish " 1}}}
 
 "------------------------------------------------------------------------------